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(No Model.)

T. ZANGER.

ULAMP FOR CANOPY TOPS.

No. 800,427. v Patented June 17, 1884.

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THEODOR ZANGER, OF BUFFALO, NEV YORK, ASSIGNOE OF ONE-HALF TO J. B. SWEET & SON, OF SAME PLACE.

CLAMP FOR. CANQPYQTOPS.

EPECIPICATION forming part of Letters Patent NO. 300,427, dated June 17, 1884.

Application filed January 7,1884. (No model.)

To all whom, it iii/(1.11 concern:

Be it known that I, Tnnonon Znnenn, a citizen of the United States, residing at the city of Buffalo, in the county of Erie and State of New York, have invented a new and useful Improvement in Malleable Clamps for Use on Childrens Carriages and the Like, of which the following is a specification when taken in connection with the accompanying drawings.

My invention relates to clamps such as are used for securing to their supports the parasols used upon childrens carriages.

The object of my invention is to provide a more desirable device than those now known I 5 and used for the purpose, and one that can be produced at a less cost. To this end I change the clamp in form and use a different material in its construction.

I-Ieretofore it has been common to construct these clamps of steel; but repeated experiments have proven to me the feasibility of constructing them of malleable castiron. This results in a very great saving in price without lessening the utility of the holder.

The accompanying drawings illustrate my invention, in which Figure 1 represents a top view of the improved spring-clamp. Fig. 2 represents a side view thereof. Fig. 3 repre sents a top view of the device with a notched 0 head having a screw-threaded central perforation. Fig. 4t represents a side view of the notched head of the clamp united by a thumb screw to the notched head of the supportingrod.

A designates the body portion, B B bifurcations, b b and b 1) curves in bifurcations, and C the attaching-joint. The changes in form which I make are not necessary by reason of the material I use, as it is equally well In constructing this device it will be found advantageous to so proportion the metal in both bifurcations that the strain brought upon the device in inserting or removing the parasol will be pretty nearly equal at all points from the body A to b and by each bifurcation. This result may be partially accomplished at the molding, and grinding will do the rest. The mode in which these devices secure the parasol and permit its removal need not be explained, as it is already understood.

If the butt or joint end of the device be flattened, rounded, perforatechand provided with cogs in the manner shown by Fig. 3, and the perforation screw threaded, the device will be found very desirable for use upon supports having a terminal joint similar to the one here shown, Fig. l; and when thus constructed a thumb-headed screw-bolt will give ready control over and perfect safety to the joint. i

The construction and use of the several forms shown will readily be understood from an inspection of the figures.

A further description of the clamp is as follows, viz: It is cast in the usual manner of casting such articles and with the bifurcations distended in about the position shown in Fig. 3. The casting is then subject to an annealing process,whieh renders it malleable. It is not, however, left in the oven quite so long as the ordinary malleable-iron casting. After the casting'has been removed from the oven ,and has become entirely cool, the bifurcations are hammered (by hand) until they acquire suflicient hardness-and elasticity. The bifurcations I confine closed by means of a screw or open ring or sleeve, 0. I have shown a sleeve of malleable cast-iron, with a projection upon either side to aid in forcing it to or from a given point, and of sufficient thickness to retain its position after being sprung upon the clamp. Now, by moving this sleeve toward or from the ends of the bifurcations, the clamp will open or close according to the direction in which the sleeve is moved.

The clamp may be straight or arched, according to the position desired to be given the parasol.

I am aware of the patent to Gibson, of Auion gust 9, 1881, and of the patent to Tibbals, of

July 11, 1882, and of the patent to Downing, of October 9, 1883, and I claim nothing therein either shown or described.

What I claim, therefore, and desire to secure by Letters Patent, is 1. As a new article of manufacture for sustaining parasols upon their supports, a springclamp controlled and confined by means of sleeve 0, and having a main or body portion A, bifurcations B B, having curves b and b, and a circular joint-head, E, provided with cogs d, and a threaded perforation, all substantially as shown, and for the purposes set forth.

2. As an article of manufacture, a springporting-rod. 

